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#define GLH_REALfloat -No fractions and Nothing for DBL and LDBL STL -Uses default DBL_EPSILON, FLT_EPSILON and Intel IPL -Doesn't specify DBL, FLT or LDBL Look, here are some consolidatedresults of my investigation how different libraries and compilers declare an Epsilon:Įpsilon for Floats - smallest such that 1.0+FLT_EPSILON != 1.0Įpsilon for Doubles - smallest such that 1.0+DBL_EPSILON != 1.0Įpsilon for Long Doubles - smallest such that 1.0+LDBL_EPSILON != 1.0 >.Decimal32 types are NOT available for C++!.īut,this is a common problem whenthere isa question like: Could I trust the data?Īconcept of Epsilon partially resolves it. Would you be able to upload docs, headers and libs for what you have? I understand that you want to use an external library to do all FP-based calculations. The IEEE-754 floating-point standard is a standard for representing and manipulating floating-point quantities that is followed by all modern computer systems.
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In case of float data type ( single precision )and 24-bit precision setup in FPU a loss of accuracy is expected if a mantissa is greater than 2^24 = 16777216. Could youprovide more details regarding problems withyour 3.05 + 0.05 test case? What was wrong?